Iyai, D. A., M. Sagrim, S. Pakage, and A. G. Murwanto. 2020. “The Roles of Additive Effect Between Swine Keeping Systems and Agro-Ecological Zones in Production and Socioeconomic Traits”. Jurnal Sain Peternakan Indonesia 15 (3):242-50. https://ejournal.unib.ac.id/jspi/article/view/10884.